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<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
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<body>
    <script>
        //第一次作业
        document.write("JavaScript我来了！")
        console.log("它~会魔法吧~")
        alert("你好~JS!")
    </script>
</body>
</html>